I want to reinstall Windows 7 Ultimate x64 with SP1 on my computer, but I don't want to lose my programs and files on C drive. Is there any possibility to do this without installing programs again? Because my computer doesn't work normally (for example: Network and Sharing Center isn't working properly or sometimes I cannot boot computer in first attempt). I tried Startup Repair and System Restore, but without success. I found a lot of solutions, but none of them exactly matches with properly reinstalling. Any chance to reinstall Windows 7 without any destruction on C drive? Thank you.
Bite the bullet. Save your important files and do a fresh install. A hours work max and you'll be up and running all nice again.
I failed to re-install Windows 7 with Upgrade option. It keeps 0x80070570 error and upgrade wasn't successful.
As posted already. You (the OP) have 2 reasonable options To repair what's not working or a clean install. When deciding for the latter try to backup anything that is possible (settings / personal data)
It sounds like a memory issue ! Most probably because of a bad RAM chip. If you have multiple RAMs in your MBs sockets then take out all and then install 1 RAM at a time and see if it boots (check out all the RAMs 1 by 1) Also, do a memtest on every single RAM (I personally use Hiren's Boot CD to test).
Are you Sure about that ? May be the HDD has bad sectors. check it once. (use HDD Sentinel from Hiren's Boot CD's in DOS mode to check HDD's Health)