We tested NT 4.0 Workstation on various desktop systems ranging from a Zenith Z-Noteflex 486/75 notebook with 16MB of RAM, up to a Digital Venturis Pentium Pro-based system with 32 MB of RAM. Although NT worked on all systems, we encountered problems upgrading from NT 3.51 on several of them.
In each case, we traced the problem either to failure to follow the release notes' detailed instructions or failure to update a third-party driver during setup. Based on this experience, we recommend you carefully inspect your system setup before you upgrade. If you're using any third-party drivers, don't assume they'll work with NT 4.0. Check with the vendor to see if an updated driver is available before you attempt to upgrade.
Certain applications also require an upgrade because of changes in an NT subsystem. In particular, most remote-control applications won't work because of an NT video-architecture change. And fax applications that combine a 32-bit server and a 16-bit client will be affected by the change in NT's print spooler. Some third-party network redirectors won't work either.
