the jumping cursor problem is a Boot Sector Virus issue. I fixed it by
starting my Computer in Safe Mode F8, then doing a Virus Scan.
I figured this out is when I reformatted my hard drive, the problem
still existed; there fore the only place for the information to hide was
in the Boot Sector.
When You Virus Scan in Safe Mode, the Virus cannot Hide Itself from the Scanner. At least this one worked for Me.