What I did that I think might have caused the problem is, I have 2 hard drives in my computer: a 500gb that windows is installed on and then a 1tb hard drive that I just put in recently. After about a week of putting the 1tb hard drive in I formatted it so that I could use it as storage. Im not sure what I formatted it to because I was really just wanting to erase whatever was on it. I wasn't sure if i was going to use it as my main windows hdd or just use it as storage.
Now after a long delade boot, the 1tb hdd dosnt show up in My Computer or in device manager under drives.
Here is the run down of what happens at the boot:
at the bios DELL screen, it lags for about 3-4 minus (cant even hit F2 at this point for settings).
Then I get a message that says "Drive 2 not found: Serial ATA sata-2
Alert! Failed to detect one or more drives during POST."
I can push F1 to contune and when I do, windows boots up and everything seems fine but the second drive dosent show up in My computer or in device manager under drives.
If i unplug that hdd then boot, I get no such alert and it boot as normal
System Info.:
System
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Manufacturer Dell Inc.
Model Dell XPS420
Total amount of system memory 4.00 GB RAM
System type 64-bit operating system
Number of processor cores 1
Storage
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Total size of hard disk(s) 1397 GB
Disk partition (C

250 GB Free (455 GB Total)
Disk partition (D

1 GB Free (11 GB Total)
Media drive (E

CD/DVD
Media drive (F

CD/DVD
Disk partition (L

206 GB Free (932 GB Total)
Graphics
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Display adapter type NVIDIA GeForce GTX 260
Total available graphics memory 2654 MB
Dedicated graphics memory 896 MB
Dedicated system memory 0 MB
Shared system memory 1758 MB
Display adapter driver version 8.17.12.9610
Primary monitor resolution 1280x1024
DirectX version DirectX 10
Network
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Network Adapter Intel(R) 82566DC-2 Gigabit Network Connection
Network Adapter Bluetooth Device (Personal Area Network)
Network Adapter Anchorfree HSS Adapter