Dell Inspiron 14 2-in-1 7440 Intel Core Ultra 7 150U Pen Lag Fix Windows 11

Windows 11

Writing on the Dell Inspiron 14 2-in-1 7440 feels delayed, with the ink trailing behind the pen tip. The Intel Core Ultra 7 150U convertible uses an active pen and digitiser, and a low pen battery or an outdated pen driver is usually behind the lag.

Fix 1 — Recharge or Replace the Pen Battery

A weak pen battery is the number one cause of lag and skipping. If the Inspiron pen uses an AAAA battery, replace it. If it is rechargeable, charge it fully. A fresh battery often restores instant ink response on the Inspiron 14 2-in-1 7440.

Fix 2 — Update Touchscreen and Pen Drivers

• Open Dell Command Update or Dell Support for Inspiron 14 2-in-1 7440
• Install the touchscreen, HID and pen driver updates
• Restart and retest the pen in Whiteboard

Fix 3 — Close Background Apps

Open Task Manager and close apps using high CPU. When the Core Ultra 7 150U is busy, the digitiser polling slows and the pen lags. Freeing the CPU restores smooth, low-latency inking on the Inspiron 14 2-in-1 7440.

Fix 4 — Remove a Thick Screen Protector

If you fitted a screen protector, peel it off and test. A thick or air-bubbled protector raises the pen above the digitiser and adds latency. A thin paper-feel film designed for pens is a better choice if you want protection without lag.

“A fresh AAAA battery in the pen removed the lag instantly on my Inspiron 14 2-in-1 7440. It was that simple.” — Adib, Seremban

Frequently Asked Questions