Sometimes, "MS Shell Dlg 2" errors appear after updating a specific program. The error message can be a bit misleading, as the application is trying to access a system resource that is temporarily unavailable.
Open Settings > Personalization > Fonts and search for "Tahoma". Download Ms Shell Dlg 2 Font
If it is missing, copy the Tahoma.ttf and Tahomabd.ttf files from a working Windows PC via a USB drive. Sometimes, "MS Shell Dlg 2" errors appear after
reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes" /v "MS Shell Dlg 2" /t REG_SZ /d "Tahoma" /f Download Ms Shell Dlg 2 Font