I've Dell windows 10 pro dual core2 desktop which I bought few months ago from beaniebouquet manufacturer through eBay.There was free anti virus named "Awast"came along with computer after installing the awast, I got stuck with the problem which was, the web pages were scrolling itself up and down frequently. So I scanned with the anti virus and found seven threads in C drive .Awast automatically fixed the problem and computer restarted again but I was wondering when the error flashed on the blue screen .... drive 1 not found.Serial ATA , SATA-1.Alert failed to detect one or more drive during POST. Strike F1 key to continue , F2 to run the setup utility. Press F5 to run onboard diagnostics.I pressed F5 and checked after completing the process I got the msg Pre boot system assessment complete. No diagnostic utility partition identified. Please select ok to reboot your computer .I did it but and I got same msg drive 1 not found.Serial ATA , SATA-1.Alert failed to detect one or more drive during POST. Strike F1 key to continue , F2 to run the setup utility. Press F5 to run onboard diagnostics.......what to do now please solve my problem I'm new to the hardware things .....I need your Valuable advice .I hope I provided all the information to you If you need more please let me know but please solve my problem .I let you know one more thing tha there were no recovery Cds, provided by manufacturer. I'm waiting for your reply.