Yet another in a long line of dubious (and anonymous) 'reviews' graces the apps pages. I have twice installed McAfee VirusScan 4.5 on my Win2K system without any problems at all and certainly with no worse a performance hit than 4.02 presented (i.e., almost negligible). I can only imagine that the reviewer in this case has a distinct issue with something common to all the machines tested and not necessarily with this software.
Currently, I have 33 processes in task manager, 158 out of 196 MB physical memory in use and with MCShield.exe itself only using 3MB. Control panel loads in about a second (all icons visible a split second later). I can run scans on anything I want without any problem whatsoever. This is with the latest engine and DAT installed (via SDAT4082.EXE) but it was fine before too. I have all options enabled (System Scan, Email Scan, Download Scan & Internet Filter) along with comprehensive heuristics and macro-virus detection and all files are being scanned, not just programs.
Kit -
Tyan 1696DLUA (onboard dual-channel Adaptec 3940AUW)
2 x 333 Celerons on MSI 9605 Adapters
3 x 64MB DIMMs
Yamaha 4260
1 x Seagate (badged Compaq) 34572W 4.5GB SCSI
FireGL 1000 (8MB)
SB AWE64
Intel PCI network card
Diamond SupraExpress 56e (external).