On computers with CPU's without SSE2 BaseCamp does not start.
Got the same error 0xC000001D with Garmin BaseCamp as for Garmin Express.
Please recompile all your software with /arch:IA32 or /arch:SSE parameter.
A computer with an Athlon XP 3200+, 2 GB RAM, ATI Radeon HD 3450 AGP and a fast harddisk is fast enought for Windows 7.
Your software runs on such systems without problmes if you use the above compiler settings.