Good news is that you have backup file on your system and we don't need installation disk.
Step 1
NOTE: This fix is custom made for this system only and for current system state! Don't try to run it on another system!
Please close all running programs and Run OTL
- Under the Custom Scans/Fixes box at the bottom, paste in the following
:OTL
:Files
c:\windows\SysWow64\Drivers\atapi.sys|C:\Windows\ERDNT\cache64\atapi.sys /replace
:Commands
[emptytemp]
[Reboot] - Then click the Run Fix button at the top
- Let the program run unhindered, reboot the PC when it is done
- Post the fix log it produces in your next reply or you can find it in C:\_OTL\MovedFiles
Step 2
Download aswMBR.exe ( 511KB ) to your desktop.
- Double click the aswMBR.exe to run it
- Click the "Scan" button to start scan
- On completion of the scan click save log, save it to your desktop and post in your next reply
Step 3
Download Virus Removal Tool from Here to your desktop
Run the programme you have just downloaded to your desktop (it will be randomly named )
First we will run a virus scan
Click the cog in the upper right

Select down to and including your main drive, once done select the Automatic scan tab and press Start Scan

Allow Virus Removal Tool to delete all infections found
Once it has finished select report tab (last tab)
Select Detected threads report from the left and press Save button
Save it to your desktop and attach to your next post
Step 4
Please don't forget to include these items in your reply:
- OTL fix log
- VRT log
- aswMBR log