the last software I installed was adobe reader
was this the day before you started having problrms
Check to see if your computer is running in PIO mode.
open Device manager... double click on the IDE/Atapi controllers ...double click on the primary controller ... click on the Advanced settings tab and check to see what the drive is set to.... the drive should be UDMA Mode 5 or 6.
To try fixing it...
Open Device Manager....Double-click IDE ATA/ATAPI Controllers to display the list of controllers
Right-click the icon for the channel to which the hard drive is connected...usually the primary... select Properties... and then click the Advanced Settings tab.
In the Current Transfer Mode drop-down box, select DMA if Available if the current setting is "PIO Only."
If the drop-down box already shows "DMA if Available" but the current transfer mode is PIO... then you must toggle the settings....
Change the selection from "DMA if available" to PIO only, and click OK.
Then repeat the steps above to change the selection to DMA if Available....