Not sure if anyone can suggest a course of action, but I am unable to locate the .msu files associated with these errors found by checksur. They are not in catalog.update.microsoft.com and various links to the MS Downloads site return 404 errors. I cannot find 2008 R2 x64 versions for:
KB978262
KB973874
KB2524375
=================================
Checking System Update Readiness.
Binary Version 6.1.7601.22471
Package Version 26.0
2021-04-16 11:19
Checking Windows Servicing Packages
Checking Package Manifests and Catalogs
(f) CBS MUM Corrupt 0x800F0900 servicing\Packages\Package_for_KB978262_RTM~31bf3856ad364e35~amd64~~6.1.1.0.mum Line 1: V»Ûk
Checking Package Watchlist
Checking Component Watchlist
Checking Packages
(f) CBS MUM Missing 0x00000002 servicing\Packages\Package_1_for_KB973874~31bf3856ad364e35~amd64~~6.1.1.0.mum
Checking Component Store
(f) CSI Manifest Failed Catalog Check 0x00000000 winsxs\Manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.21687_none_c4d713580bbb6202.manifest
(f) CSI Manifest Failed Catalog Check 0x00000000 winsxs\Manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.17582_none_c448751af2a24385.manifest
Summary:
Seconds executed: 3692
Found 4 errors
CSI Manifest Failed Catalog Check Total count: 2
CBS MUM Missing Total count: 1
CBS MUM Corrupt Total count: 1
Unavailable repair files:
winsxs\manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.21687_none_c4d713580bbb6202.manifest
winsxs\manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.17582_none_c448751af2a24385.manifest
servicing\packages\Package_for_KB978262_RTM~31bf3856ad364e35~amd64~~6.1.1.0.mum
servicing\packages\Package_1_for_KB973874~31bf3856ad364e35~amd64~~6.1.1.0.mum
servicing\packages\Package_for_KB978262_RTM~31bf3856ad364e35~amd64~~6.1.1.0.cat
servicing\packages\Package_1_for_KB973874~31bf3856ad364e35~amd64~~6.1.1.0.cat
KB978262
KB973874
KB2524375
=================================
Checking System Update Readiness.
Binary Version 6.1.7601.22471
Package Version 26.0
2021-04-16 11:19
Checking Windows Servicing Packages
Checking Package Manifests and Catalogs
(f) CBS MUM Corrupt 0x800F0900 servicing\Packages\Package_for_KB978262_RTM~31bf3856ad364e35~amd64~~6.1.1.0.mum Line 1: V»Ûk
Checking Package Watchlist
Checking Component Watchlist
Checking Packages
(f) CBS MUM Missing 0x00000002 servicing\Packages\Package_1_for_KB973874~31bf3856ad364e35~amd64~~6.1.1.0.mum
Checking Component Store
(f) CSI Manifest Failed Catalog Check 0x00000000 winsxs\Manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.21687_none_c4d713580bbb6202.manifest
(f) CSI Manifest Failed Catalog Check 0x00000000 winsxs\Manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.17582_none_c448751af2a24385.manifest
Summary:
Seconds executed: 3692
Found 4 errors
CSI Manifest Failed Catalog Check Total count: 2
CBS MUM Missing Total count: 1
CBS MUM Corrupt Total count: 1
Unavailable repair files:
winsxs\manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.21687_none_c4d713580bbb6202.manifest
winsxs\manifests\x86_microsoft-windows-capi2-certs_31bf3856ad364e35_6.1.7601.17582_none_c448751af2a24385.manifest
servicing\packages\Package_for_KB978262_RTM~31bf3856ad364e35~amd64~~6.1.1.0.mum
servicing\packages\Package_1_for_KB973874~31bf3856ad364e35~amd64~~6.1.1.0.mum
servicing\packages\Package_for_KB978262_RTM~31bf3856ad364e35~amd64~~6.1.1.0.cat
servicing\packages\Package_1_for_KB973874~31bf3856ad364e35~amd64~~6.1.1.0.cat