I am having a similar issue, I bought a new PC and re-installed every programmes with no problem whatsoever, the only important difficulty I am facing is FSUIPC cannot run because of this VCRUNTIME.dll. I read the instructions in FSUIPC, went to the Microsoft forum first, read the instructions, then downloaded the necessary 2015 files and installed them. Restarted the PC. No success, FSUIPC wont start.
On this new PC (with Windows 11 Home edition), I noticed that already installed are Microsoft Visual C++ 2010 (32 and 64 bits), 2013 and now 2015, 2017 is not there, when going to the download page, only versions up to 2015 are available (I must say that I am somewhat confused by the complexity of the presentation which is less than clear for non-initiated like me). There is also a 2022 version which I installed as well, to no avail.
I uninstalled FSUIPC, re-installed, registered and everything is OK, except that when I click on the FSUIPC exe file, I am still getting this message of error.
Would you be so kind to please clarify the road ahead with the understanding that you are talking to an old computer illiterate person who was a pilot (hence my interest for simulators) but not a programmer!
I thank you for your assistance.