Hi Xeno86 and/or Tihiy, I tried to install MS viewers 2003 but without success - except Powerpoint viewer (this one installed and run OK). When I run the setup of Word or Excel viewer, I get the message: The specified program requires a newer version of Windows. When I set the compatibility for setup.exe, another message appears: This program has performed an illegal operation and will be shut down. If the problem persists, contact the program vendor. When I click the Details, one can see following data: SETUP caused an exception c06d007fH in module SETUP.EXE at 0167:30021e16. Registers: EAX=0062ead8 CS=0167 EIP=30021e16 EFLGS=00000246 EBX=00000000 SS=016f ESP=0062ea80 EBP=0062ead0 ECX=c14ded70 DS=016f ESI=300221b4 FS=23ff EDX=81826ce8 ES=016f EDI=bfe80000 GS=0000 Bytes at CS:EIP: 8b 5d d8 8b 45 0c 89 18 a1 b0 c1 07 30 85 c0 74 Stack dump: 00000000 00500728 0062eb44 00000024 300221b4 30024078 30022240 00000001 300225c0 bfe80000 00000000 0000007f 00000000 00000000 3007bd54 0062eae0 Please could you give me a hint for successful instalation/runing of the viewers? I have Win98SE (fresh installed) and KEx 4.5 RC1.