1. Insert rescue disk
2. At a:> type fdisk
3. Select option #4 to veiw current partition info
4. If you want to remove select option #3 and delete partition
5. Select option #1 to create a new primary dos partition

Formatting

1. Insert rescue disk
2. Select without cd rom support
3. At a:> type fdisk/mbr
4. At a:> type format c:
5. After format is complete at a:> type scandisk c: then do a surface scan which will mark all bad clusters so that your new operating system will not write to them.
6. Reboot with an antivirouse disk and run a virouse scan
7. Install your new operating system