a quanto pare molti non dormono la notte, struggendosi nel tentativo di stabilire quali patch installare e quali no. di seguito la mia personale opinione su quelle da evitare.
* ci si riferisce naturalmente a utenza consumer con sistema operativo Windows XP SP1 *
820291
This update adds a new icon for the Set Program Access and Defaults feature to the second column of the Start menu.
Perchč: introdotto in seguito a motivi giudiziari. Semplicemente non serve a nulla.
817778
The Advanced Networking Pack for Windows XP is a set of platform technologies designed for the use and deployment of advanced networking solutions. It includes an updated IPv6 stack supporting NAT traversal for IPv6 applications, an IPv6 firewall, and a peer-to-peer platform for writing distributed solutions.
Perchč: puō alterare la configurazione di rete e introdurre problemi di connessione. Sulla maggior parte dei sistemi č privo di utilitā pratica.
Microsoft .NET Framework version 1.1
For developers, the .NET Framework makes it easy to rapidly create powerful software that maximizes performance, scalability, opportunities for integration, reliability, security, and the end-user experience, while minimizing the costs of deployment and management.
Perchč: da installare solo se giustificato da necessitā di sviluppo o per far funzionare applicativi che lo richiedono.
322011
This update addresses the "Preview is Unavailable in Fax Console with Windows XP SP1" issue in Windows XP.
Perchč: inutile se non si usa il fax integrato di XP.
327979
This update addresses the "Game Stops Responding (Hangs) or Quits Unexpectedly When Introductory Video Clip Is Played" issue in Windows XP.
Perchč: riguarda una manciata di giochi messi in croce con video Indeo. Inutile se non si riscontra il problema.
810243
Watch television shows recorded by Media Center PCs on other Microsoft Windows XP PCs.
Perchč: no comment...
Microsoft Windows Journal Viewer
This accessory allows people who do not have a computer running Windows XP Tablet PC Edition to view files that were created in Microsoft Windows Journal on a Tablet PC.
Perchč: no comment...
L'installazione della nuova versione di Movie Maker e Windows Messenger dipende naturalmente dai gusti personali. Stesso discorso per Windows Media Player 9.
vediamo ora le cosiddette patch di sicurezza che possono tranquillamente restare nel cassetto:
330994: Security Update for Outlook Express 6 SP1
A security issue in Microsoft(r) Outlook Express(r) has been identified that could allow an attacker to read files on your computer, or cause a program to run.
Perchč: scenari improbabili, protezione adeguata offerta dalla patch cumulativa di IE6.
821557
An identified security issue in Microsoft Windows could allow an attacker to compromise a Microsoft Windows-based system and then take a variety of actions.
Perchč: scenario limitato e specifico, altamente improbabile per l'utenza consumer. Da installare invece sulle macchine aziendali.
811493
A security issue has been identified that could allow an attacker to compromise a computer running MicrosoftŪ WindowsŪ XP and gain complete control over it.
Perchč: scenario irrilevante, non costituisce rischio significativo. Dimostrato l'impatto negativo sulle prestazioni della prima release.
815021
An identified security vulnerability in MicrosoftŪ Windows NTŪ 4.0, Windows 2000, and Windows XP could allow an attacker to take control of the computer. This issue is most likely to affect computers used as web servers.
Perchč: scenario irrilevante, non costituisce rischio per l'utenza consumer. Da installare su macchine server.
329834
This update resolves the "Unchecked Buffer in PPTP Implementation Could Enable Denial of Service" security vulnerability in Windows XP.
Perchč: scenario assolutamente irrilevante, non costituisce rischio per l'utenza consumer. Da installare su macchine server.
329390
An identified security vulnerability in Windows XP could enable an attacker to compromise a user's MicrosoftŪ WindowsŪ-based computer and gain complete control over it, if the user visited the attacker's web site or took other, less likely, actions.
Perchč: scenario mitigato, rischio improbabile. Installazione riservata agli asini che accendono il PC senza connettere il cervello.
328310
A security vulnerability has been identified that could allow an attacker to compromise a Windows-based computer and gain complete control over it. The attacker would need the ability to log onto the computer to carry out an attack.
Perchč: vulnerabilitā inutilizzabile senza accesso interattivo. Scenario irrilevante.
810565
This update contains several fixes to Windows components to better support default Web browsers other than Internet Explorer. Download now to improve the interaction of certain Windows components with default web browsers other than Internet Explorer.
Perchč: update dovuto alle vicende giudiziarie di Microsoft. Riservato a chi usa applicazioni di terze parti al posto di quelle dello zio Bill; tutti gli altri facciano pure spallucce.
810833
A security issue has been identified that could allow an attacker to compromise a computer running Microsoft(r) Windows(r) and gain control over it. This issue is most likely to affect computers used as servers.
Perchč: se non avete un server in casa, tirate dritti.
810577
A security issue has been identified that could allow an attacker to compromise a computer running Microsoft(r) Windows(r) XP and gain control over it. To attempt an attack, the attacker would have to be able to log on to the computer.
Perchč: necessario accesso interattivo. Se qualcuno si logga sul vostro PC mentre non ci siete č pių probabile che formatti tutto o installi un virus. Che gli venga in mente di danneggiarvi con una sottigliezza degna di Shakespeare č alquanto improbabile.
823980
A security issue has been identified that could allow an attacker to remotely compromise a computer running MicrosoftŪ WindowsŪ and gain complete control over it. This security issue is the vulnerability that is exploited by the blaster worm.
Perchč: se la macchina č protetta da firewall l'installazione della patch č irrilevante. Considerata la diffusione del worm Blaster, č bene comunque prenderla attentamente in considerazione.
817606
An identified security issue in Microsoft Windows could allow an attacker to compromise a Microsoft Windows-based system and then take a variety of actions. For example, an attacker could execute code on the system.
Perchč: impossibile approfittarne senza autenticazione del server; presenza di un firewall annulla il rischio. Non significativo per l'utenza consumer.
Q329048
This update resolves the "Unchecked Buffer in File Decompression Functions" security vulnerability in Windows XP
Perchč: irrilevante.
329170
A security vulnerability has been identified that could allow an attacker to disrupt a facility by which security settings are applied to Windows-based computers in a corporate network. This could allow the attacker to loosen settings on his or her own computer or impose tighter ones on someone else's.
Perchč: di scarso rilievo in uno scenario di rete aziendale; di nessun rilievo per l'utenza consumer.
331953
A security issue has been identified that could allow an attacker to cause a computer running MicrosoftŪ WindowsŪ to fail. An attacker would need the ability to connect to a process on the computer.
Perchč: di nessun rilievo in presenza di protezione firewall.
L'aggiornamento della famigerata Java Virtual Machine si ritiene sempre necessario, ammesso che non abbiate la fortuna di aver aggiornato Windows XP direttamente alla versione 1a del Service Pack, e quindi siate del tutto sprovvisti della porcheria.
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si merita un bel primo piano 
Grazie infinite per i suggerimenti, Casper!!! 
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