Hi.,

Firstly, use some of your business profit to buy a cd burner. Please.
Second, always update your antivirus frequently.
Third, avoid using AOL coz it sucks. Really sucks.
Four, check registry, is there something odd using some registry checker software or antivirus.
Five, always update and backup your data. Even some school boys computer geeks know how to do it.
Six, check if your os or hdisk have problem. Run through scandisk. See the result.
Seven, Get antoher computer and make it as your server, i mean only dedicated to your business. Its much safer.

Dont give up ok.