What is splwow64.exe error? Splwow64.exe error is a severe .exe error that is closely related with splwow64.exe. Splwow64.exe acts as one of the components of Thunking Spooler Print driver host from 32 to 64 bit applications of Windows operating system developed by Microsoft Corporation. Splwow64.exe locates on C:\Windows. There are multiple system problems can result in splwow64.exe error, including missing or damaged splwow64.exe, corrupt splwow64.exe removal/repair failure, incompatible version of splwow64.exe, driver file damage, driver update failure, undesirable modification on Windows registry, related registry file corruption, associated .dll file damage and cyber threat attacks. Consequences of splwow64.exe error: Splwow64.exe can possibly lead to further complicated system problems, including: Printer driver update failure Printer driver file corruption Unexpected Blue Screen of Death errors Drastic decrease of system performance Black Screen of Death errors with driver file details Third- party program install/uninstall failure Sluggish computer performance Software instability Increasing times of program freezes Malware invasion Undesirable system pops- up increase Common splwow64.exe error messages: splwow64.exe