Updating the boot system marker ( boot system flash c1900-universalk9-mz.spa.158-3.m7.bin ). Reloading the router.

After downloading, always verify the MD5 or SHA512 checksum provided by Cisco against your local file. This ensures the file wasn't corrupted during the download process. Installation Quick-Steps Once you have the file, the standard upgrade path involves:

Cisco IOS Software: C1900-UNIVERSALK9-MZ.SPA.158-3.M7.BIN Overview