Hi,
Let's start with cleaning junk files first. Download
CCleaner and install it. Run it, click "Options" button and here go to "Settings" tab and uncheck the option "Only delete files in Windows Temp folder older than 48 hours". Click "OK" to exit from the Options and click "Run Cleaner" to start cleaning.
Next, download
WebRoot SpySweeper Trial and install it. Run it, click "Options" button. Click "Sweep Options" tab, and here select all the Hard Disk Partitions. In the "Where to sweep" option box, select "Sweep all folders on the selected drives". In the "What to sweep" option box, make sure all the items are selected. Then click "Sweep Now" button and click "Start". Remove any malware it may find.
After this, perform an virus scan at
Panda ActiveScan with teh "Disinfection" option enabled.
Save the log file it gives, and post it back here.
Run
Disk Defragmenter to defragment the hard disk, so that computer sppeds up. You can run Disk Defragmenter by going to Start > Programs > Accessories > System Tools > Disk Defragmenter. It takes a while to run Disk Defragmeneter. So please
close all other programs before running it.