I have suddenly started to have problems with a few programs. Adobe Acrobat 6.0 hung while downloading a PDF file from the web. I uninstalled it but now it hangs (at about 4 seconds to go) when I try to re-install it. Adobe Reader 7.0 works fine. Microsoft Antispyware Beta hangs whenever it tries to connect to the web. Microsoft Windows Backup hangs at the stage when I hit "Backup Now" when trying to backup the System State. I presume these problems are all connected in some way. I run Windows XP SP2 and have no problems (as yet!) with other programs, whether accessing the web or not. Hope someone out there has some ideas of where to go from here.
I discovered that if I disabled Norton Internet Security 2005 my problems disappeared. I have now uninstalled Norton Internet Security and installed instead NTL Netguard Security and Zone Alarm. No more problems! Thanks for responses.
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