My Surface Pro is brandnew, I bought it before Christmas:
Microsoft Surface Pro 12 Zoll Copilot+ PC Snapdragon X Plus / 16GB / 512GB
The Snapdragon X Plus mobile Arm CPU is not as fast as a real AMD or Intel X86 Desktop CPU, so i suspect the 10 secs initial load time compared to your other PC that loads eM Client in 4-5 secs is probably the CPU due to “it emulating X86 speed is not fast enough”..
There is some Snapdragon X eg: Elite models that can load a bit quicker but from my own tests using them in shops, they are still no where near as fast as a real AMD or Intel X86 Desktop CPU. Maybe in the future once optimised.
Other factors are the eg: SSD drive speed or Ram Speed etc “that might be slower on the Surface Pro compared to your PC desktop” which could also cause eM Client to initially load slower apart from the CPU emulating X86.
Or could be also eg: optionally installed programs running resident in the background on the Surface Pro slowing eM Client initially opening as fast. So all that would need to be checked.
Where I can find 64bit? It seems only 32Bit on Homepage is available
There is no current separate 64Bit separate d/l version for Windows that I’m aware of atm.
eM Client might do that possibly in the future.
There is no speed advantage doing that atm from what I’ve read on the eM Client threads. See @gary post links below