After "Shut Down & Update" BIOS Won't Detect HDD

I was on vacation for 1 month and after that my PC suddenly did a check to 1 of my HDD's (Samsung 1000GB HDD - My storage drive that sometimes I just don't see in system anymore and system restore fixes the problem usually). After that check, my PC worked fine whole day, but the next day i Turn it on (After installing about 7-8 Important windows updates) I don't see my Samsung HDD, So I thought it's a usual problem that I have, I notice that the only restore points I have are from year 2011... That didn't suit me and I thought why do I have restore points so far behind ? But then I notice 1 more important update if I shut down my PC, So I thought it might fix the problem and maybe create another restore point for me. That's where I shut down my PC and start it again. Now it takes a lot longer in my BIOS and I notice that it doesn't detect any of my HDD's and asks for boot disk after that. Now I'm clueless what to do, since the problem I had was only with 1 HDD that had lesser rpm than my other one that i use for my system (Also it was the cheapest 1000GB HDD that I have seen long time ago and seems to have a lot of problems)

OS Windows 7 32-bit RAM 3GB (1GB + 2GB) Mobo (I don't know exact module but i write what was written in BIOS) Intel I945 for 945GZM-S2 F2 also i Know its from GIGABYTE HDD's: 1x 120GB 7200rpm with 3 partitions, 1x SAMSUNG 1TB (1000GB) HDD with 5400rpm CPU Intel Dual core 2.00GHZ

I haven't tried anything much other than pressing delete key and configuring BIOS... they were set to default nothing helped there + It doesn't detect multiple HDD's. the PSU is new and probably had same Voltage or even more I don't remember exactly which one of those.