The Response / Refresh time get very slow at times when opening folders on various local, network (direct and mapped) drives. At time even 'f5' does not respond properly. Is there a repair or update for this?

Hi, Did the issue occur in any folders? Whatre the type of files in that folders? In my opinion, I would like suggest you to check the issue under safe mode. If the error doesnt appear in Safe mode, then a non-Microsoft program might be the cause of the issue. A clean boot helps in eliminating software conflicts. Visit the link below to know how to perform a clean boot to get rid of the conflicting program. How to troubleshoot a problem by performing a clean boot in Windows 7 http://support.microsoft.com/kb/929135Spencer TechNet Community Support