What is the method of compression ??
if you compressed with nanozip then you will have to wait for it 
it takes time, to check if it works open control-alt-delete and see there
please post some pictures about method, tools and ini files so i can help with details
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My projects : Masked Compression, lzma2(xz) on Freearc, Zstd compressor for windows
My optimizations : packjpg.exe, zstd, lzham, precomp-dev-0.45.
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