click start type cmd press enter command prompt then type in chkdsk/f/r which will scan for and and attempt repair of bad files and bad sectors on hard drive
you should have no input while chkdsk utility is in progress any input might further damage your computer or
Use the System File Checker tool (SFC.exe) to determine which file is causing the issue and then replace the file.
Type the following command and then press ENTER: sfc /scannow The sfc /scannow command scans all protected system files and replaces incorrect versions with correct Microsoft versions.
http://windows.microsoft.com/en-US/windows/products/security-essentials/product-information
malware protection
press windows button and in the search type msconfig go to startup tab and uncheck those you dont want to start.
scroll to the bottom toolbar bottom of screen right click you can select task manager applications also processes you will see whats running on your computer and ticking over you might have a virus
if you see something running that you does not need to be running select end now then you might you might uninstall that particular program
and some unnecessary programs
you should also check leads from motherboard to hard drive for secure dust free connections
click start control panel administrative tools computer management disk management right click on your drive select properties click tools you should see click check now
click start tick in both boxes this will schedule to on restart
do not have any input while chkdsk utility is in progress any might damage your computer
also you might download and use this registry cleaner it is totally free to use
http://download.cnet.com/ccleaner/
then defragment your hard drive
adding more ram is the best way of speeding up a computer
If you're not sure if a module is right for your system use the
Crucial Memory Advisor tool for a list of guaranteed compatible modules
you should always ask for a guarantee on compatability before purchasing any ram and buy working pairs if possible
you might have to many programs running at the same time putting to much strain on the CPU
try uninstalling a few unnecessary programs
hope this helps
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