About OUTLOOK!! Do not make up your own backup and then complain it doesn't work! Here's how to find your backup method. Type OL2000 BACKUP into google.com and read the matching article.

About lockups. You didn't share if you have ejected PARASITES which are not dealt with by any known Antivirus. Typical tools are Spybot, Adaware, Cwshredder, Housecall and Stinger.

About DOS BASED WINDOWS. You may need to read OPTIMIZING WINDOWS at http://www.aumha.org/articles.htm But I'm thinking pests.

Best of luck,