BL-4163 Don't update if running on Vista (#1411)
BL-4163 Don't update if running on Vista (#1411)

This change is intended to be put only in a final 3.7 which we will release
for the purpose of preventing Vista updating to later (3.8) versions
since they require an incompatible version of .NET.

Do NOT merge into master or any later branch.
andrew-polk/BloomDesktop,BloomBooks/BloomDesktop,StephenMcConnel/BloomDesktop,JohnThomson/BloomDesktop,BloomBooks/BloomDesktop,BloomBooks/BloomDesktop,andrew-polk/BloomDesktop,StephenMcConnel/BloomDesktop,BloomBooks/BloomDesktop,gmartin7/myBloomFork,gmartin7/myBloomFork,BloomBooks/BloomDesktop,andrew-polk/BloomDesktop,StephenMcConnel/BloomDesktop,gmartin7/myBloomFork,andrew-polk/BloomDesktop,StephenMcConnel/BloomDesktop,gmartin7/myBloomFork,andrew-polk/BloomDesktop,StephenMcConnel/BloomDesktop,gmartin7/myBloomFork,JohnThomson/BloomDesktop,gmartin7/myBloomFork,BloomBooks/BloomDesktop,andrew-polk/BloomDesktop,JohnThomson/BloomDesktop,StephenMcConnel/BloomDesktop,JohnThomson/BloomDesktop,JohnThomson/BloomDesktop