WIN 7 wont Boot!

i believe it was newegg. should i see the sata hard drive listed somewhere in my bios because i dont see it listed all i see is the cd/dvd drive

also my bios date went back to march 2000 right after i ran the malwarebytes scan. i just put it back to 2012. what is going on with this computer.

Just got here, trying to read through all these symptoms. Weird!

Tell us exactly what happens after you power up. Do any screens show up? Does the screen remain black? Take the side cover off. Do you here any sqeaking or grinding noises? HDD can fail both electrically, and mechanically. Cause randon crashes and data loss. This error message, when do you get it. Is there any code numbers. Tell us in a, step by step, as it occurs.

when i turn on comp post looks normal, but does not load windows just has text saying boot from cd/dvd. hard drive seems to be still good, hard drive light blinks normally and i can access C:dir in dos prompt and it shows windows directory space avail on drive

i believe malwarebytes deleted something and windows dvd startup repair wont fix it. anyway to replace startup code to get it to boot win 7?

I believe the only thing to try is a system recovery. If it will not recovery, then I'd look toward a hardware failure. So, it happened to occured during a system scan. That does'nt mean Malwarebytes cause all this. It just may of been enough to send the HDD into failure. I've seen motherboards do the same.

You could take the HDD and try it in another PC?

Does your motherboard have a green light, if so, is it blinking?

yes the hd light is blinking slowly just as it always has. i can access the C:\windows directory no problem. i even copyied the software , system, and Sam files that were backed up from last weeks registry. that worked fine so i think the drive is okay. but it still wont boot. something is still missing

If you didn't complete the scan by cleaning up any items which Malwarebytes found then it didn't remove any. More likely it found an infection which became agitated and spread, or something unrelated happened.

Work through these steps to disinfect and repair System files, check and repair boot configuration from Disk: Troubleshooting Windows 7 Failure to Boot - Windows 7 Forums

thanks for the replys. i have no idea what happened. i finally got it booted last night. and went to malwarebytes log and it didnt have logs or info from the scan, so i think it didnt remove anything. it might of been a bad hard drive or bios error. i dont know. all i know is weird stuff was happening. time was off in bios and it wouldnt show hdd in bios at all. but i could access drive from win7 dvd command prompt. after resetting bios a bunch of times and it finally saw hdd. and after coping some registry backup config files. and some other tinkering it finally booted. i replaced cmos battery today even though i dont think it was dead. its runnin fine now we'll see how long it will last. thanks again