My Windows Explorer often takes upwards of 1 minute to respond to any interation (mouse click, keyboard). After responding, it works normally for around 10 seconds or 3-5 clicks/keystrokes, then takes a further 1 min + to respond. It happens when Windows Explorer is invoked from anywhere in the system, including Open/Save dialogs, installation dialogs, etc. This behaviour also affects Internet Explorer, but that is less of a problem since I don't need it for anything.
I have tried resetting Internet Explorer to default options, scanning for spyware using AdAware and Spybot, using HijackThis! to remove BHOs etc, removing all mapped drives, removing all entries from network neighbourhood, removing all favourites, turning off indexing and a number of other suggestions found on this site and elsewhere.
The machine in question has Windows 2000 Service Pack 4 (5.00.2195) on Pentium 4 2.0Ghz with 394Mb RAM and 40Gb local hard disk. It runs McAfee Enterprise 8 andGoogle Desktop but disabling these does not appear to make any difference.
Reinstalling Windows is not an option, unfortunately.
I am fairly confident using Windows, and am prepared to try virtually any suggestions. Editing registry settings and stuff is no problem.
I have spent a considerable amount of time and effort researching and experimenting this. I use this machine for upwards of 8 hours every working day and this is possibly the single most frustrating problem I have come across in 12 years + of extensive computer use! I have therefore allocated the maximum allowed points for this problem, and would be willing do more if possible. Please ask me for any more information you require, I will be watching very closely.