Test your PSU or replace it if your power supply units fan is not working your PSU is faulty
One bad lead can cause a computer to fail to detect a hard drive continue on a cycle or to shutdown
Test all leads that attach to your hard drive including electrical extensions,IDE,SATA and
the leads from your motherboard to your hard drive make sure they have a secure connection and are not faulty or just replace them there probably old and faulty
problems
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty ?
hope this helps
then click start run type cmd then type chkdsk/r/f which will scan for and attempt to fix any bad sectors automatically fix any corrupt files on your hard drive then defragment your hard drive you have to keep a computer very clean & free of dust and give it regular maintanance
?
hope this helps
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