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What is GRL? GRL is used as the file extension for Windows Update Status files. .GRL files are binary files that are used to store information about the current Windows configuration for Windows Update. See the sample .GRL file included below.

File Extension: .GRL

MIME Type: application/octet-stream

File Content: Windows Update Status

.GRL files are Windows Update Status files saved as binary files to store information about the current Windows configuration for Windows Update. Here are the first 128 bytes of a sample .GRL file, Active.GRL, dumped in HEX values:

4d 00 53 00 47 00 52 00 4c 00 00 00 01 00 00 00 M.S.G.R.L.......
a0 db 25 85 ed f6 c5 01 03 00 00 00 02 00 00 00 ................
01 00 00 00 58 00 00 00 02 00 00 00 01 00 00 00 ....X...........
01 00 00 00 03 00 00 00 e4 00 00 00 02 00 00 00 ................
04 21 00 00 01 00 00 00 00 00 00 00 01 00 00 00 ................
4c 21 00 00 e4 2d 00 00 4a 5b 2f 3d 8e 6f 33 94 L.......J....o3.
83 9d 5b 3b 23 94 8d 4e 5a bd 7e df de 67 fb f4 .......NZ....g..
ce d6 7f 9b 4a f7 dc 4b 7a e6 fd 4b 97 a6 44 64 ....J..Kz..K..Dd

.GRL Windows Update Status file sample: Click sample.grl to download.

For more information on .GRL Windows Update Status files, see links below:

• Windows Update