WINCheckIt 2.0 Released in 1994 by TouchStone Software Corporation For Windows 3.1 Wincheckit was a popular diagnostics and system cleaning utility for Microsoft Windows 3.1. It diagnoses issues with CMOS/BIOS setup, finds IRQ problems, tests I/O devices and memory, benchmarks system performance, removes unused application files, and fixes system files. S/N: A6-021294