Uninstall For PC-700 Business Audio Problem: If a customer wants to install any sound card in a PC-700 with Business Audio, the Business Audio must be disabled first. If an install of a sound card, OBI Multimedia Kits in particular, is attempted before the Business Audio is disabled, then Windows will lock up. If a customer has achieved this lockup, they must do a clean boot using F5 on boot, then revert to the backed-up System.ini and Win.ini files. OBI Multimedia Kits usually rename these as System.i00 and Win.i00. Solution: 1) From Windows, open Main / Control Panel / Drivers. 2) There will be one or two drivers visible; CS31BA11 WSS 2.0, and Voyetra/ IBM. Usually only one of these drivers is installed. You must click on the driver, and then delete to remove them from the system. 3) Do NOT restart Windows when asked; instead, exit to DOS. 4) Edit the Windows\ System.ini file and comment out the following lines from the [386Enh] section. You may see either of these, or both. ;device = vgame.386 (add ; to comment line out) ;device=vsndsys.386 5) Edit the Windows\ Win.ini file and comment out the following line: ;run = c:\windows\rrtsklst.exe (add ; to comment line out) 6) COLD BOOT the machine. On boot, hit F1 during memory count to enter the Configuration Utility. 7) Select Device and I/O Ports / Audio, and set port address to [Disable]. Save and exit, then restart. 8) Start Windows. Windows should now load with no sound and no errors. 9) Install Multimedia Kit hardware/software per kit instructions.