screenshot by Lance Whitney/CNET

Microsoft apparently has a fix up its sleeve to patch a download glitch affecting Windows 10 store users.

On Saturday, some Windows 10 users started reporting that they couldn't access the app store to download either new apps or updates to existing apps, according to Mary Jo Foley of CNET sister site ZDNet. Further, certain store apps, such as the Windows 10 mail app, were not working properly. For example, Foley said that her Mail client showed new mail arriving, but she couldn't open, delete or move any messages.

Though Microsoft has not yet publicly revealed the source of the problem, the software giant has now promised a fix. In a brief statement sent to blog site Windows Central early Tuesday, a Microsoft spokesperson said that "this issue will be resolved within the next 48 hours via Windows Update." Assuming that timeframe holds, affected users should expect a fix sometime Tuesday or by end of day Wednesday.

Windows 10 officially started rolling out on July 29 to members of the Windows Insider program, who've been testing the new OS and offering their feedback. Windows 7 and 8.1 users who reserved the free upgrade have also been receiving it. On July 31, Microsoft reported that Windows 10 had been running on 14 million devices at that point.

Microsoft has a lot riding on Windows 10 to make up for the poor reception to Windows 8. The company is anxious to get its new OS into the hands of as many people as possible, one reason why the upgrade is free to Windows 7 and 8.1 users. Microsoft also intentionally set up a phased rollout of Windows 10 whereby Windows Insiders would get it first, allowing the company to fix any initial glitches, and then continue the rollout to other users. Overall, the upgrade seems to be going smoothly. But there have been glitches along the way, which are almost to be expected with such a massive rollout, even after all the internal and external testing.

A cumulative update pushed out last Wednesday has created installation and reboot issues for some users. Some people have speculated that the Windows Store issues and the cumulative update problems are related, but there's no evidence to suggest a connection at this point.

Microsoft did not immediately respond to CNET's request for comment.