somehow i seems to erase some of my hard drive because when i try to launch a program is says is not there. when i go to property it shows me nfts on the c drive. how can i repair this?
As far as I know, there are 2 types of hard drive damage. One is fixable by you and the other requires a professional data recovery facility.
Physical Drive Damage - It is the worst. Data recovery can only be done by professionals and it can cost up to $1,500 (sometimes higher). Physical damage usually consists of bad actuator arms, damaged platters or fried controller cards.
For the Non-Physical Drive Damage, it’s easily fixable with some software that's already including in any Windows PC and a USB external hard drive enclosure.
Please follow the steps below to perform a non-physical repair (software repair) on a non-bootable hard drive.
1. Take the drive out of the computer.
2. Connect the hard drive to the connector on the USB enclosure.
3. Connect a USB cable from the enclosure to the computer that's working.
4. Power on the USB enclosure.
5. An external drive will probably load in your list of available hard drives. You can see this list by opening "My Computer" or "Computer". Take note of the drive letter for the external hard drive.
6. Now it's time to load a program called CHKDSK (Check Disk).
7. Click Start (if you're on Windows XP) or click the Windows globe (on the bottom left for Vista and Windows 7).
8. On Windows XP click RUN, then type CMD. On Windows Vista and 7 type CMD where it says "Search Programs and Files". This will open a black command prompt window.
9. In the command prompt type chkdsk "the drive letter you want to check": /r and press enter. So here is an example chkdsk g: /r then press the enter key.
10. This process can take hours. I've had a few that took days.
11. If this command completes successfully your drive should be repaired enough for you to recover the data from it and you might actually be able to boot from it again.
You may have a virus infection, when a file is infected most anti-virus programs simply delete the infected file and thus disabling the program. Windows files are normally unaffected because critical files are restored from backup automatically without you knowing. To fix this try downloading the free version of Malwarebytes anti-virus program and after you have scanned your computer reinstall the non working programs.