Expect to upgrade more than Windows if you're an America Online user making the move to XP. Version 6.0 of the popular ISP's software will not function properly with Microsoft's newest operating system.

Glitches, such as an inability to access the instant messenger feature, will occur unless you install AOL version 6.0.2 or 7.0.

Which version of AOL 6.0 am I using?
Everyday users may not be able to tell the difference between AOL 6.0 and 6.0.2 before upgrading to XP. Here's how to detect which version you're running.

1. Log on to AOL.
2. Click Help and choose About America Online.
3. Check the version number. Only number 4111.50 is compatible with XP.

I've already upgraded to XP. Now what?
Once you upgrade to Windows XP, AOL 6.0 will permit you to log in three times before it blocks you from the service. Each time you sign on, you will be prompted to upgrade to version 7.0. You will not receive these messages if you're running a compatible version (6.0.2 or 7.0).

Find AOL updates
Both version 6.0.2 and 7.0 are available to download from the America Online website. If you don't want to download the full 32MB AOL client, upgrade using a free installation CD available at most office supply and electronics stores.

Are you still nervous about upgrading? Read a full review of AOL 7.0 here.