Memory leak or trojan causing extreme system slowness and high memory usage. (Microsoft Corporation) C:\Windows\splwowexe. #1 Splwowexe continues to take up memory #2 Excel flickers when this process is running. OS: Windows 7 x64 Applications: Office After some hour there is 5 - 20 splwowexe processes and they use from MB to 1,5GB of memory and they are there until i restart the. Neither satisfied the desired memory release I wanted to see achieved. I could confirm the correlation with the SPLwowexe process and. our customers are experiencing several issues with the splwowexe which consumes a huge amount of memory, making the OS almost.