I just want to clean up anything that might take up memory and hamper my comps performance.

Every time I don’t use the computer for at least 20-30 min. or more,websites won’t load. Or it will say"connection timeout",page error". What I always have to do is restart the computer in order for it to work correctly! I could be online for 8 hrs. straight,but if I leave the computer alone for a while then get back on,it gives me that same problem. I have ran scans,CCleaner,registry cleaner,but nothing prevents it from not happening. It has been doing this for a while now!

I have Windows XP desktop. I have plenty of memory. My idle is set to 30 min. Any help would be appreciated..

memory and registry cleaners?

i did a scan on my pc it said i have 840 errors on my pc i need a registry cleaner the ones ive tried only take out one or two where do i buy one ?what store dont want to order on line also how do i get more memory on my pc how do you put it on ?where do you get best buy doent understand what im talking about,my pc is vista home basic ,how much does it hold help ,help, thanks

My memory is almost full. i went through and deleted a bunch of programs I don’t use and old documents, but it still says it’s almost full? How can I clean it up? Thanks!

My computer was fine just the other day, but i started it up today and now it wont boot up! I get an error message ‘Windows failed to start. A recent hardware or software change might be the cause.
Status : 0xc0000221
Info : windows failed to start because a required file is missing, or corrupt.

I put my vista setup disc in, i ran ALL the things it told me to (system restore, windows memory diagnostic, system repair, command prompt) but still they all fail.
I dont want to lose ANY files, because i have been doing lots of work lately on the pc and saved lots of important documents, is there a way i can reinstall vista without losing any of my important work?