Patching Without Disrupting Care: Planning Maintenance Windows

Unpatched software is one of the most common ways attackers get in. When a vendor announces a security flaw, criminals often begin trying to exploit it within days or even hours. At the same time, anyone who has worked a care floor knows why IT teams hesitate: a workstation that restarts in the middle of charting, or an update that breaks a printer driver, creates real problems for staff and residents.

The solution is not to avoid patching. It is to patch deliberately, with planning that respects clinical workflow.

Why Delay Is Dangerous

CISA maintains a catalog of known exploited vulnerabilities and encourages organizations to prioritize fixing those first. The pattern is consistent: flaws in operating systems, web browsers, VPN appliances, firewalls and common business software get actively exploited after disclosure. A facility that applies updates months late spends much of the year exposed to problems that already have fixes.

Know What You Are Patching

You cannot update what you do not know about. Keep an inventory that includes:

Workstations, laptops and tablets

Servers and virtual machines

Firewalls, switches, wireless access points and VPN devices

Printers and multifunction devices

Medical and building devices, which often require vendor involvement

Third-party applications such as PDF readers, browsers and remote tools

Cloud services are typically patched by the provider, but you remain responsible for settings, accounts and any software you install yourself.

Prioritize by Risk

Not every update has the same urgency.

Emergency: actively exploited flaws, especially in internet-facing systems such as firewalls and VPNs. Aim to patch within days, sometimes sooner.

High: critical vulnerabilities in operating systems and common software. Patch within a couple of weeks.

Routine: other updates in a regular monthly cycle.

Your own targets should match your risk tolerance and resources. Whatever you choose, write it down and follow it.

Build Maintenance Windows Around Care

Pick times with the least clinical impact and agree on them with nursing leadership.

Workstations: schedule installs outside peak charting times, and set active hours so restarts do not occur mid-shift. Shared nurse station computers might be updated during the quietest overnight hours, with a staggered approach so not all machines are down at once.

Servers and network equipment: use planned windows, often late night or early weekend, with notice to affected departments.

Medical devices: coordinate with clinical engineering and vendors. Never update a clinical device without checking manufacturer guidance.

Stagger rollouts so there is always a working workstation on each unit.

Test Before Broad Deployment

Even well-made updates occasionally cause trouble. A simple testing approach:

Choose a small pilot group of representative devices, such as one workstation from each major department.

Apply updates and watch for a few days.

Verify key functions: EMR login, printing, scanning, eFax, barcode scanners and other peripherals.

Roll out to the rest in stages.

For critical servers, snapshots or backups before updating make rollback possible.

Communicate Clearly

Most resentment about updates comes from surprise. Send brief notices to affected staff:

What will be updated and when

How long it might take

What staff should do beforehand, such as saving work

Who to call if something does not work afterward

A short message at the start of a shift, delivered through a huddle or posted at the station, can prevent a flood of calls.

Handle the Hard Cases

Unsupported or legacy systems

Some software and devices no longer receive security updates. Options include replacing them, isolating them on a segmented network, restricting what they can reach, and monitoring them closely. Document the exception and the compensating controls. Note that support for Windows 10 is scheduled to end in October 2025, so start planning for workstations that cannot upgrade.

Vendor-controlled systems

If your EMR or another application depends on a specific version of software, talk to the vendor about their compatibility and patching timeline. Ask for guidance in writing.

Devices that are always on

Kiosks, nurse station computers and servers may run for months without restarting, which delays updates that need a reboot. Schedule restarts deliberately.

Verify It Happened

Track results. Reports from your management tools should show which devices are fully patched, which failed, and which are offline. Follow up on stragglers every month, since laptops that spend time off the network are often the most out of date.

A Simple Monthly Rhythm

Week 1: review new updates and priorities

Week 2: pilot on test devices

Week 3: deploy in stages during agreed windows

Week 4: verify, chase exceptions, and report to leadership

Where UnityCare IT Helps

UnityCare IT manages patching for healthcare clients with schedules built around clinical workflows and reporting that shows what is current. If updates in your facility are ad hoc or avoided, we can help you build a rhythm that works.

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