I read some good reviews of this product on other on-line sites so I thought I'd try it. As many in "Download.com's" "Negative" reviews pointed out, it works fine for a couple of weeks or so and then all Hell breaks loose. Actually, I'm not even sure I'd say it worked okay before it began its crash: Often it would detect a virus but would claim to be unable to delete it or quarantine it. I'd note where it was and then manually go there to rid my OS of the supposed virus. Anyway, my OS is WIN98SE, and when NOD32 began its crashing it took my OS with it, with repeated OS crashes, unable to start, repeated Kernel32 faults, etc. Re-loading WIN98 failed to stop this massive product failure. I almost had to re-format my hard drive. Fortunately, after un-installing NOD32 and doing a thorough Regedit I'm okay now. But what a nightmare! This may be a good product on a newer OS, but I found it to be a disaster on WIN98. Use at your own risk!