Forum Moderators: phranque
Welcome to WebmasterWorld!
What browser is the client using?
Which ones have you tested?
If the client is using IE, have him flush the browser cache (Temporary Internet Files). Also, while he's in there, have him set its size to some sane number, like 8 to 64 Megabytes -- small cache for broadband and big cache for dial-up.
For really serious cases of browser corruption, you may need to delete the file:
Documents and Settings/<username>/Local Settings/Temporary Internet Files/Content.IE5/index.dat
This file can get bloated and corrupt. If you remove it, Windows will re-build a nice, small, clean file on the next reboot or login. There are no other side-effects to doing this, and there are privacy and performance advantages to doing so.
However, the currently-logged in user cannot see his own Content.IE5 directory or the index.dat file in it (because it is in-use and hidden by Windows), so deleting it usually requires logging in as an admin to clean up user files. On Win98 and WinME, the easiest way to remove this file is to boot to DOS and delete it manually.
I recommend cleaining up this file at least once a year -- Just this one step can often 'rejuvenate' a computer that seems to be booting up more and more slowly as time passes.
[Added] Oh, and if the above doesn't help (or he can't do it), then he should consider downloading and running Ad-Aware and SpyBot Search & Destroy malware removers (both free and reputable)-- He might have malware on that machine. [/added]
Jim