A friend went to format,and install win 98 on his laptop.When it asked for the win98 disk which was in the CD-ROM,he didn't know to type the path to the CD,and skipped the file(several times

)SO when he brought it to me, I started it up,typed the path to the disk,and loaded all the drivers ect.When I rebooted SMART says that HDD failure.Knowing that SMART has acurate predicted failure a few times for me,I suggested a new HDD.
He wanted to play with the computer since it was gonna die anyways,and did a ME upgrade.Now the SMART says nothing,and the computer works better than it ever has before.
It this possible because of a borked 98 setup?Or should I find a HDD anyway?I thought once a HDD was dying nothing could be done.Only time will tell for sure I guess.Anyone have any experiance with this?
Also I have formatted and installed windows 5 times in 2 months on this machine because someone keeps deleting .dll files to get rid of viruses (I don't know either).Plus it gets viruses even with Norton and AVG running.I'm not sure what they're D/L or what.Could this all be related?
TIA