Ah Outlook. The email client we all love to hate. Even though it’s been around since the late 90s it’s still a total headache to use.
Causes of the Error
Have you ever tried to access your Outlook folders only to be met with an error message telling you that “the set of folders cannot be opened”? It’s one of the most annoying Outlook errors out there. But don’t worry there are a few things you can do to try and fix it.
Cause |
Solution |
Outlook profile is corrupt |
Create a new Outlook profile |
Outlook data file is corrupt |
Repair the Outlook data file |
Outlook is not up to date |
Update Outlook with the latest version |

Newest content:
Add Users To Group Powershell.
Solutions to Fix the Error
Let’s face it: we have all been there stuck with a pesky error code and unable to open our Outlook. ‘The set of folders cannot be opened’ can be a real frustration taking away valuable time in a day and ruining plans. But don’t despair you can troubleshoot the issue and find a resolution. Here are five quick-fix solutions that can help you get back on track:
1. Restart Your Computer: Abrupt change in applications and programs in your computer can throw off its performance. Thus restarting your PC can often be the most straightforward solution for many computer issues.
2. Repair Outlook: It is possible to repair certain elements of your Outlook depending on the version you are using. Inspect your Control Panel then follow the instructions to repair the existing damages.
3. Rename Outlook Files: This can help rectify some issues related to outdated Outlook data files. Find the specific Outlook files rename them and try to restart the application again.
4. Reinstall Outlook: If the issue persists reinstall Outlook on your computer. Select the correct version and try to launch the application again.
5. Contact Support: If all else fails and you feel lost it’s always best to reach out to the support team. Send an email or open a chat window to get the help you need.
Remember Outlook errors can be maddening and time-consuming. Although it may be difficult to take the time to troubleshoot the issue yourself don’t forget that you are resourceful and determined. With these five solutions and a bit of patience you will be able to resolve the error and return to your daily work activities.
Troubleshooting Steps
Aww how disappointing – you were all geared up to take a gander at your emails and with a single click your Outlook folders have decided to take a sick-day! If you’re facing this pesky issue fear not here’s a list of niftily-crafted solutions to get your Outlook set of folders back to work in a jiffy.
First up: Take a deep breath chug a cuppa regroup and relaunch Outlook. Since our computers can get into a funk every once in a while let’s try giving this program a quick restart! It just might do the trick.
If the relaunch didn’t do the job we’ll need to dig a bit deeper and give our Outlook folder a ‘cleanup dose’. It’s possible that due to some muddled-up files Outlook can’t run easily. We can try running some diagnostics so as to uncover these pesky misfits and get our program back on track. Microsoft offers a fantastic tool called ‘Scan PST’ for that.
Still no dice? Maybe Outlook is playing hard-to- get and we’ll have to tackle it from a technical point of view. We need to use cmd.exe to create a new Outlook profile and hopefully this will get our program access to the stored emails. Moreover if all steps have been tried and tested we may even need an all-out uninstall and reinstall of the program.
At the end of the day following these steps can hopefully help Outlook to kickstart its set of folders – those emails aren’t going to read themselves you know!
Preventative Measures
No one wants to experience the dreaded ‘Outlook the set of folders cannot be opened’ error – it’s enough to make your blood curdle! But there are a couple of easy-peazy preventative steps you can take to ensure your Outlook experience is one that’s-smooth-as-silk.
First and foremost make sure your Outlook app is up-to-date. Microsoft rolls-out bug-fixes and updates on a regular basis and it pays to have the most recent versions. Also try to avoid aggregating large batches of emails; too much data can be a burden to your Outlook.
If you’re finding your Outlook is slow try ramping-up its memory. Most computers come with plenty of RAM and allocating more to your app can speed-it up quite significantly.
If you’re using an Exchange server on your computer try defragmenting the server. It can be a quick way to make sure emails don’t get stuck in the system as well as providing overall performance improvements.
If all else fails you may need to reboot and reconfigure your Outlook experience. There are instructions out there on how to do this properly – easy-peasy!
Finally always remember to back-up your Outlook data! Anything can happen and it’s best to have an off-site cloud-based backup system available in case of irreparable disaster.
Hopefully with these preventative measures in place you’ll never have to encounter the dreaded ‘Outlook the set of folders cannot be opened’ error again!
Resources